ex_user_info = exercise_use_info_copy(exercise_user, user_status, exercise)
json.start_at exercise_user.start_at
json.user_id exercise_user.user_id
json.user_name exercise_user.user.real_name
json.login exercise_user.user.login
json.user_group_id @student_course_groups_hash[exercise_user.user_id].try(:[], 0).try(:course_group_id)
json.user_group_name @student_course_groups_hash[exercise_user.user_id].try(:[], 0).try(:course_group_name)
json.student_id exercise_user.user.student_id
json.commit_status ex_user_info[:commit_status]
json.end_at exercise_user.end_at
json.commit_method exercise_user&.commit_method.to_i
if subjective_type == 1
  json.objective_score ex_user_info[:ex_object_score]
  json.subjective_score ex_user_info[:ex_subject_score]
end
json.score ex_user_info[:score]
json.review_status exercise_user.subjective_reviewed  #教师是否评阅，评阅则为true，否则为false
json.has_comment exercise_user.reviewed #是否全部评阅,只有所有题目评阅完成才为true